hg: jdk/jdk: 8229474: Shenandoah: Cleanup CM::update_roots()

[zgu at redhat.com]

Changeset: 23e13076e102
Author:    zgu
Date:      2019-08-13 13:01 -0400
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/23e13076e102

8229474: Shenandoah: Cleanup CM::update_roots()
Reviewed-by: rkennke

! src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.cpp
! src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.hpp
! src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.cpp